openvpn adjustments for windows clients

We need a custom built openvpn-gui for our endusers. We require some adjustments to the installation package such as changing the icon, removing some menu features and performing a silent install. In addition to this we would request it be bundled with openvpn and all non-client files (i.e. those pertaining to the server function) to be removed from the installation package. Each user has a unique set of certificates which is generated on a backend server. These certificates should be automated into the unique user installation procedure so that no user intervention is needed to complete the installaion. The files are stored in a subdirectory on the CA machine and are generated on the fly and reside in a directory linked to the end user. The CA runs on a linux platform.